IPOD, MP3 and AUX input. VFD display. Pre-amplifier introduced by tube amplifier. Power output: 25W(8ohm)+15W*2(4ohm) Distortion: <0.1%(20Hz to 20kHz) Frequency response: Subwoofer: 50Hz to 160Hz Satellite speaker: 180Hz to20kHz Signal-to-noise ratio: >=85db Gross weight: 11.5kg Dimensions(W*D*H):380*330*260mm